The Penguins are 17-6-4 without Crosby, but Sullivan said the practice had a different feel to it because their captain was on the ice. Crosby, a three-time Stanley Cup-winning player in his 15th NHL season, has 17 points (five goals, 12 assists) in 17 games.
"When he practices, it's amazing the influence he has on our team, the pace of the practice just elevates significantly, and that's just a credit to how hard he works," Sullivan said. "His practice habits, it's contagious amongst our group and know our guys are excited when he's out there with us. It improves our team morale. Our energy's great today and we really liked the pace. We thought it was a fun practice."
The biggest challenge to coming back, Crosby said, is adjusting his timing from practice speed to game speed.
"Everything seems to happen pretty quick out there," he said. "When you're playing games, the game seems to slow down a little bit. But when you've missed an extended period of time, your timing [is off] and plays seem to develop a little bit quicker."
Forward Bryan Rust said the Penguins are eager for Crosby's return after two months.
"He's obviously been doing what's best for him," Rust said. "Just to have him on the bus, on the plane, in the hotel, just kind of joking around having a good time and being with the guys again, I think it's great for him and it's great for us."